Casing-cap for lamp-sockets.



C. J. KLEIN. CASING CAP FUR LAMP SOCKETS. APPLICATION man NOV. 15. 19:1.

11 y 1 Q 1 9 1 Q Patented J 11116 1, 1915.

mnp STATES Parana ai men.

enemas J. KLEIN, or MILWAUKEE, wrscousrn, Assreuoa ro urns CUTLEB-HAMMER MFG. Q, 01? MILWAUKEE, WISCONSIN, A CORPORA'JQION 0F WI$CONIAL CASING-GAP FOB LAMP-SOCKETS.

- Specification of Letters Patent.

Patented June it, 1915.

' To all whom it may concern:

Be it known that I, CHARLES J. KLEIN, a citizen of the United States, residing at Milwaukee, in the county of Milwaukee and.

State of Wisconsin, have invented new and useful Improvements in Casing-Caps for Lamp-Sockets, of which the following is a full, clear, concise, and exact description,

reference being had to the accompanying drawing, forming a part of this specification.

This invention relates to casings for lamp sockets and pendent switches, and with respect to its more specific features, to improve caps of such casings.

One of the objects of the invention is to provide an improved casing cap of sturdy construction which can be cheaply manufactured in any desired style.

Further objects will appear hereinafter.

The accompanying drawing is illustrative of my invention and shows two preferred embodiments thereof.

Figure 1 is a central sectional view of a lamp socket casing; and, Fig. 2 is a similar view of a modified form of cap.

lhe casing illustrated is of the type described and claimed in my co-pending application filed June 6, 1910, Serial No. 565,203 and comprises a cylindrical shell 1 having a polygonal margin 2 adapted to fit within a polygonal rim 3 of a cap 4. The interfitting rims of these two members effectively lock the same against relative ro-v tation. In order to lock the cap and shell against axial separation the shell is provided witlpone or more displaced catches5 having cut edges arranged to snap over the lower face of an internal annular groove 6 formed in the cap rim 3. If desired, however, other forms of interlocking means 4 may be provided on the overlapping portions of the casing sections. v

It is desirable in casings of the type described that the threaded bushing be" strongly attached to the cap andthat the body portion of the latter be ofi m ateri alsuflici'ently heavy to withstand the 'stram of supporting all the parts carried thereby.

On the other hand, it is'd'esirable that the margin of the cap be of material sufficiently light and malleable to permit the formation -struction.

thereon of well-defined locking shoulders for engaging the shell. To accomplish these ends, and to facilitate manufacture of the cap, the body portion 4 and rim 3 of the cap are made separately and of relatively heavy and light material respectively. I

The bushing 8 of the cap is preferably formed integrally with the heavy body portion 4, as shown in Fig. 1. If desired, however, the bushing may be separate and attached to the cap by riveting or other suitable manner, as shown in Fig. 2. The

margin of the heavy body portion 4 of the cap is provided with a transverse flange 7 to which the rim 3 is rigidly secured by spinning the same over both sides of the flange, as shown.

By forming the rim 3 separate from the 7 cap and of lighter material, the same may As will be terial as described, the sharpness'of the angular edges may be readily obtained in manufacture to a degree which would be impossible with a cap of relatively heavy material throughout. Furthermore, the rim 3 may be more readily and cheaply manufactured in the desired shape when formed separately from the cap, as it remains in the form of av ring open at both ends until attached to the body of the cap. What I claim as new and desire to secure by Letters Patent is 1. A cap for lamp socket casings comrising a. dome portion of heavy stock havmg a spreading flange at its open end and a rim of relatively light stock headed oversaid flange and rigidly secured to said'dome' portion, said rim having integral shoulders for engagement with a complementary part.

2. A cap for lamp socket or similar casings, comprising a dome portion of heavy stock having anintegral bushing at its confizmctefi end and af spreading flange at its sari my name in the presence of two witgjeg and, and e. of relattlivelyglight stocg a 2 over sax zmge an rxgn y secure m said dome portion, said rim having in- CHARLES KLEIN 1', filegml shoulders for engagement with a. Witnesses: eemplementary part. FRANK H. Hmmxn,

'in witness whereof, I have hereunto sub- 'J. S. Bnocxs. 

